Yes it is tragic and a sad loss that a young man has died and another is in hospital, but before everyone starts screaming for the track to be modified how many races successfully passed that corner without crashing?
Motorsport is supposed to be thrilling & exciting, young men (and a handful of young women) are biologically & hormonally programmed to take risks, combine the two and crashes are going to happen when something breaks or someone 'runs out of skill' at the wrong time.
Leave the tracks alone unless they are killing drivers on a regular basis. Otherwise the tracks will end up being a series of sweeping curves with miles of run-off areas.
The only way to make motorsport safe is to stop racing on tracks and do it in simulators instead.